My wife and I decided to go Silver Stem because of their great deals listed online. Until the last couple of months, all we smoked was flower, but we started buying and trying different forms of concentrates. When we went to Silver Stem, the girl behind the counter took the time to explain a lot of things to us, including how vape pens work with oil concentrates. We had no intention of doing so, but because of the great price I got with my first time customer discount, we ended up buying the pen, a couple of kinds of oil, and some flower as well. Will definitely go back there soon. Recommend highly.